<?php

namespace Aws\Arn\S3;

use Aws\Arn\AccessPointArn as BaseAccessPointArn;
use Aws\Arn\AccessPointArnInterface;
use Aws\Arn\Arn;
use Aws\Arn\Exception\InvalidArnException;

/**
 * This class represents an S3 Outposts access point ARN, which is in the
 * following format:
 *
 * arn:{partition}:s3-outposts:{region}:{accountId}:outpost:{outpostId}:accesspoint:{accesspointName}
 *
 * ':' and '/' can be used interchangeably as delimiters for components after
 * the account ID.
 *
 * @internal
 */
class OutpostsAccessPointArn extends BaseAccessPointArn implements
	AccessPointArnInterface,
	OutpostsArnInterface {
	public static function parse($string) {
		$data = parent::parse($string);
		return self::parseOutpostData($data);
	}

	public function getOutpostId() {
		return $this->data['outpost_id'];
	}

	public function getAccesspointName() {
		return $this->data['accesspoint_name'];
	}

	private static function parseOutpostData(array $data) {
		$resourceData = preg_split("/[\/:]/", $data['resource_id']);

		$data['outpost_id'] = isset($resourceData[0])
			? $resourceData[0]
			: null;
		$data['accesspoint_type'] = isset($resourceData[1])
			? $resourceData[1]
			: null;
		$data['accesspoint_name'] = isset($resourceData[2])
			? $resourceData[2]
			: null;
		if(isset($resourceData[3])) {
			$data['resource_extra'] = implode(':', array_slice($resourceData, 3));
		}

		return $data;
	}

	/**
	 * Validation specific to OutpostsAccessPointArn. Note this uses the base Arn
	 * class validation instead of the direct parent due to it having slightly
	 * differing requirements from its parent.
	 *
	 * @param array $data
	 */
	public static function validate(array $data) {
		Arn::validate($data);

		if(($data['service'] !== 's3-outposts')) {
			throw new InvalidArnException("The 3rd component of an S3 Outposts"
				." access point ARN represents the service and must be"
				." 's3-outposts'.");
		}

		self::validateRegion($data, 'S3 Outposts access point ARN');
		self::validateAccountId($data, 'S3 Outposts access point ARN');

		if(($data['resource_type'] !== 'outpost')) {
			throw new InvalidArnException("The 6th component of an S3 Outposts"
				." access point ARN represents the resource type and must be"
				." 'outpost'.");
		}

		if(!self::isValidHostLabel($data['outpost_id'])) {
			throw new InvalidArnException("The 7th component of an S3 Outposts"
				." access point ARN is required, represents the outpost ID, and"
				." must be a valid host label.");
		}

		if($data['accesspoint_type'] !== 'accesspoint') {
			throw new InvalidArnException("The 8th component of an S3 Outposts"
				." access point ARN must be 'accesspoint'");
		}

		if(!self::isValidHostLabel($data['accesspoint_name'])) {
			throw new InvalidArnException("The 9th component of an S3 Outposts"
				." access point ARN is required, represents the accesspoint name,"
				." and must be a valid host label.");
		}

		if(!empty($data['resource_extra'])) {
			throw new InvalidArnException("An S3 Outposts access point ARN"
				." should only have 9 components, delimited by the characters"
				." ':' and '/'. '{$data['resource_extra']}' was found after the"
				." 9th component.");
		}
	}
}
